Both has very high volatility.
I'm pretty sure if you are saying gambling, then you must be doing something wrong when trading. Have you done any research and not jump into it blindly?  Drop in trading is pretty normal hence it says very volatile.

I would prefer to spread your investment into 10 top coins on coinmarketcap instead of just putting it into singular coin as the title says. So, your investment won't become a disaster if one coin dumps in one moment.